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Day by day wind power technology is more dominating on the other types of renewable energy sources. Out of different types of generators doubly fed induction generator is more popular due to its superior controlling characteristics of active and reactive power at sub synchronous and super synchronous speed. But whenever there is any fault on the grid which causes voltage dip, the performance of the DFIG is affected since its stator and rotor are connected to the grid. When voltage sag occurs on the stator terminals, a transient current appears on the rotor converter which may damage the rotor side converter. The grid code suggests that these wind power plants should remain connected to the grid under such circumstances and contribute the fault current safely. But it is difficult to satisfy for DFIG connected wind plants. This paper presents the feed forward current regulator for rotor side converter of DFIG and analyses its low voltage ride through capability. Keywords-DFIG, RSC, GSC, LVRT.

Low Voltage Ride through Capability Improvement of DFIG using Feed Forward Current Regulator